I am wondering if the builder of my house properly followed electrical code or, if the mishap I experienced is just an unfortunate situation. I am in the middle of installing ceiling mounted racks in my garage. The ceiling in the section of the garage I am mounting in is made up of oriented strand board (OSB), I think 5/8" thick. Since the weight these will bear is not great, I am not necessarily mounting the brackets on joists, but not avoiding them either. Screws used are 3/4" long wood screws. There is a room above the garage. While coming inside briefly, my wife asked if I was going to reset the breaker for whatever I had tripped. Not aware anything needed to be reset, I asked, and found out the entire circuit for the room above was not working. I checked the panel but could not find a tripped breaker. The breaker marked for that room didn't appear to be tripped, but I reset it anyway. Some brackets ended up either on a joist or right at the endge of a joist. I suspect one of these small screws, which would have barely gone past the OSB, had somehow punctured a wire. My gut is telling me that a wire installed there couldn't possibly be compliant with electrical code, but I wanted to check in with the tickedted electricians here. I can't get to removing that OSB panel until tomorrow night at the earliest, so I can't 100% confirm that's what happened, but the evidence is certainly pointing to that.